Fuse



Aug. 7, 1935. H. STUECKMANN 2,012,898

FUSE

Filed May 19, 1955 15' Zr? Z6 Z3 Herman 1532x665 XNVENTOR HIS ATTORN EYS Patented Aug. 27, 1935 UNITED STATES PATENT OFFICE FUSE Herman Stueckmann, Chicago, Ill.

Application May 19, 1933, Serial No. 671,912

3 Claims. (01. 200-130) This invention relates to certain novel im- 25 of the fusible strip 23 being angled under the provements in fuses, and has for its principal mounting 22 for engagement with the resilient object the provision of an improved construction end portions I6 and 20 of the strips I and I9, of this character which will be highly eflicient in respectively. The cartridge 2| is held in the 5 use and economical in manufacture. transverse slot I! by the bearing action of the 5 An object of this invention is to provide a new s ient tac end P s d 20 against replaceable or renewable fuse of the plug type. the angl Contact end P n 5 of t e usible Another object of the invention is to provide a Strip new replaceable or renewable plug type fuse v d in the y H is an opening ecess including a, nono d ti body having an 26 which communicates at its inner end with the 10 openin formed th i d magnifying 1 transverse slot I'I. Arranged in the recess or arranged in the said opening to magnify the opening pon a flange or e e 27 of the b y fusible strip and thereby facilitate determining i a ma n y transparent glass lens 28 the condition of th f ibl t i which is held in position by a clamping ring 29. 5 oth object ill appear hereinaften The lens 28 magnifies the size of the fusible strip The invention consists in the novel combina- 23 Seen therethlollgh, readily enabling it to be tion and arrangement of parts t be hereinafter determined whether or not the fusible strip 23 is d ib d and 1 intact or has been fused. In the latter case the The invention will be best understood by refus ble strip 23 may be replaced y Sliding e eren t th accompanying drawing, showing cartridge 2| out of the transverse slot I1 and then 20 the preferred form of construction and in which: arranging neW fusible Strip 3 upon the Fig. 1 is a side elevational view of a preferred mount form of th new f The electrically conductive means I2I3 Fi 2 is a t plan View of the same; I4I9 provides an open circuit having a Fig. 3 is a longitudinal sectional view on line gap formed therein by or between the es ient 25 3. .3 i Fi 1; contact members I6 and 20. This gap is closed, Fi 4 is transverse sectional View on line through the fusible strip 23, by the engagement in Fi 3; d of the angled end portions 25 thereof with the Fig. 5 is a perspective detail view of the replace- Contact members and 30 t cartridge. While I have illustrated and described the pre- 30 The new fu is generally indicated at m in ferred form of construction for carrying my inth drawing is of t plug type, and includes an vention into effect, this is capable of variation electrically non-conductive body II around and modification, Without departing from the which is a corrugated, threaded contact ring I2. Spirit of the invention 1, therefore, do not M t on th body H is t t screw 3 wish to be limited to the precise details of con- 35 t hi h i tt h one end of a conductive struction set forth, but desire to avail myself of metal strip I4. This strip I4 extends through such variations and modifications as come withlongitudinal slot I5 formed in the body II and in the scope of the ded claims.

has a resilient angled contact end portion I6 ar- Having thus described y ve on what I ranged in a slot I! that extends transversely claim as new and desire to Protect y Letters 40 through the body I I. Patent is:

Having one end attached to the contact ring In an electrical plug having on opening ex- I2 and. extending through a longitudinal slot I8 tending through its outer W a P r of conthat extends through the body II parallel to the tact strips as i d w h said p and h v n slot I5 is a conductive strip I9 which has a resilp i ns x en n n said p aid con- 45 ient angled contact end portion 20 arranged in act strips compr g an p rc and the th transverse l t l1, portions extending into said openings being The new fuse I0 includes a. replacement carshaped to provide resilient reaches, a fuse cartridge, generally indicated at 2|, (Fig. 5) and tridge insertible into said opening and having a is removably inserted into the transverse slot I'I. fuse strip detachably connected therewith, one 50 This cartridge 2| includes an electrically nonwall of said opening comprising an abutment for conductive mounting 22 and a reversible fusible the fuse cartridge ar d to hold the fuse Strip metal strip 23 mounted thereon. The fusible strip in firm engagement with the resilient reaches of 23 has portions thereof projected through slots said contact strips. 5 24 formed in the mounting 22; the end portions 2. A device of the type described comprising a plug having a transverse opening extending through its outer wall and positioned inwardly of each end of the plug, a pair of contact strips imbedded in the plug and having reaches extending into said opening, a sight opening formed in one end of the plug and communicating with said opening, and a fuse cartridge insertible in said opening, said fuse cartridge comprising a rigid member having a fuse strip detachably connected therewith, said fuse strip covering a portion of two sides of said rigid member, one portion of the fuse strip engaging the contact strips and the other portion being visible through said sight opening.

3. A device of the type described comprising a plug having a transverse opening extending through its outer Wall and located inwardly of each end of the plug, a pair of contact strips imbedded in the plug and having reaches extending into said opening, a sight opening formed in the plug and communicating with said opening, and a fuse cartridge insertible in said opening, said fuse cartridge comprising a rigid memher having a fuse strip connected therewith, said strip engaging the contact strips for electrically connecting the same, a portion of said fuse strip being visible through said sight opening.

HERMAN STUECKMANN. 

